The Cardinals have as many rings as any team other than the Yankees. Their fans have the right to be confident and borderline "arrogant." Because they've proven their mettle time and again when it matters. I'm a Buckeyes fan, and you can bet your backside I could probably be described as arrogant. When your team backs it up, I don't see much problem with it.
I'm starting to become arrogant in regards to the Reds, and it feels nice for a change